From: Jianqun Xu xjq@rock-chips.com
Add devicetree bindings for i2s controller found on rk3066, rk3188 and rk3288 processors from rockchip.
Signed-off-by: Jianqun Xu xjq@rock-chips.com --- Changes since v1: - modify the description of clock-names property, adviced by Mark Rutland. - modify the example to fit for rk3288.
.../devicetree/bindings/sound/rockchip-i2s.txt | 36 ++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/rockchip-i2s.txt
diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.txt b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt new file mode 100644 index 0000000..9fc577d --- /dev/null +++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.txt @@ -0,0 +1,36 @@ +* Rockchip I2S controller + +The I2S bus (Inter-IC sound bus) is a serial link for digital +audio data transfer between devices in the system. + +Required properties: + +- compatible: should be one of the followings + - "rockchip,rk3066-i2s": for rk3066 + - "rockchip,rk3188-i2s", "rockchip,rk3066-i2s": for rk3188 + - "rockchip,rk3288-i2s", "rockchip,rk3066-i2s": for rk3288 +- reg: physical base address of the controller and length of memory mapped + region. +- interrupts: The interrupt number to the cpu. The interrupt specifier format + depends on the interrupt controller. +- #address-cells: should be 1. +- #size-cells: should be 0. +- dmas: DMA specifiers for tx and rx dma. See the DMA client binding, + Documentation/devicetree/bindings/dma/dma.txt +- dma-names: DMA request names should include "tx" and "rx" if present. +- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names. +- clock-names: Shall be "i2s_hclk" for I2S bus and "i2s_clk" for master clock + +Example, for rk3288 I2S controller: + +i2s0: i2s@ff890000 { + compatible = "rockchip,rk3066-i2s", "rockchip,rk3288-i2s"; + reg = <0xff890000 0x10000>; + interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>; + #address-cells = <1>; + #size-cells = <0>; + dmas = <&pdma1 0>, <&pdma1 1>; + dma-names = "rx", "tx"; + clock-names = "i2s_hclk", "i2s_clk"; + clocks = <&cru HCLK_I2S0>, <&cru SCLK_I2S0>; +};